Endless traveling belt with standing sides.



G. GATES.

ENDLESS TRAY/'BLING BELT WITH STANDING SIDES.

APPLICATION FILED APR. 9.1908.

vPatented July 13, 1909.

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GEORGE GATES, Oli ALAMEDA, CALIFORNIA.

ENDLESS TRAVELING- BELT WITH STANDING SIDES.

Specification of Letters Patent.

Application led April 9, 1908.

Patented July 13, 1909.

Serial No. 426,054.

T o all whom it may concern:

Be it known that l, Gnonen Gares, a citizen ol the United States, and a resident ot Alameda, in the county ol Alameda and State of California, have invented new and useful Improvements in Endless Traveling Belts with Standing Sides, ol which the following is a specification.

rlhis invention relates to improvements made in an endless belt with standing sides along the edges, such as is used in ore-concentrating machines to 'form the endless traveling sluiced surface on which the ore-pulp is concentrated, and for otherpurposes where an endless conveying surlaee with raised or standing sides to confine the material being conveyed or operated on is required to travel and return over drums or rollers.

The object olf the invention is chiefly to provide a raised or standing side on an endless traveling belt, that will withstand the tension, strain and wear to which it is exposed and subjected in ruiming on and returning over the rollers at the end ol the machine, and that will have the quality et preserving its shape and stiilness without cracking or breaking down for a much longer time than the ordinary standing side as heretofore formed on the belts ot the same description novr in use.

To this end and object the invention consists in an endless traveling belt with standing sides having the sides reinforced and strengthened as hereinafter described and pointed out in the claims at the end ot this specilication reference being had therein to the accompanying drawing in which- Figure l represents in plan 01 top-view a portion el an endless belt embodying my said invention, the same showing' a portion ol the standing-side along one edge, with the material removed trom around the reinforcing means that extends beyond the lower end ol the standing-side. Fig. 2 is a vertical transverse section through Fig. l. Fig. 3 illustrates a slight modification in which a -flat elastic reinforcing-strip is substituted for the cylindrical reinforcing-strip seen in Figs. l and 2. Fig. 4l is a side elevation of the raised side seen in Fig. 3, the view being taken from the lett side ot Fig. 3.

The endless traveling belt to which my invention is applied as shown in the above 'figures ol' the drawing is constructed at the present time o'll rubber or rubber and canvas,

the standing side a being formed integrally with the bottom or carrying surl'ace i) ol' the belt by molding and vulcauizing the material in the well known manner. But owing to the constant bending and returning around the carrying rollers to which the standing-side is exposed when in operation, it becomes cracked on the edges and l'requently is rendered unserviceable bel'ore the body or carrying-surlace oi' the belt is worn out. This is especially the case el' the rubber belts nianui'au-tured l'or ere-colmentrat ing machines on which the standing-sides are made el more elastic material than the body el' the belt and have also less thickness olE material along the top than at the bottom Where the standing sides join the body, in order to all'ord the greatest elasticity to the material at the part that. is exposed to the greatest strain and stretching. 3y reason of such constrtuftion, however, the durability ol' theI stainling-sides has heretoil'ore been oi' relatively short duration, and the li'le ol' a rubber concentrator-belt is limited by the serviceableness oll its standing edges. When those parts become cracked or broken down, the belt is no longer usable and it must be replaced even though t-he carrying surface is yet unworn. This defect and weakness in the standing sides oi a rubber belt l have succeeded in overcoming by placing within the material of the standing side a along their top-edge (LX at the time ol`- molding the belt., a strip et' elastic rubber d incased in woven l'abric in such i'orm or manner that the strip and its easing will be inclosed by and embedded within the rubber oi` the standing-side. This strengthening-strip is best l'ormed oi' a rubber cord having a covering ol` woven il'abric, and a surrounding spirally-laid wire el sin-ing brass f like a helical spring, slipped over the covered cord, at the time it is placed in position in the "dough at the time ol' molding the belt. By using a ilat strip (ZX ot' rubber in place ol` the cord d l secure practically the same e'ect with the ilat rubber strip without the wire coil f.

When applied and arranged in the manner described, the cord or the 'llat strip strengtheus the standing-side along the line of Weakness or least resistance to the stretching and bending strains, contributing an elastic quality to the same at and along the top-edge to an extent that will prevent the edge from cracking lor some considerable time when in use in the machine; and in the event of the material cracking the fabric covered strip Will check any cracks that may start at the edge of the standing side and prevent them from penetrating below the line of the inserted strip, Whether the covered cord d or the flat strip ZX be used. The serviceability of the standing edge of the belt will thus be seen to be limited only by the durability of the inserted strip, and although that part is formed off rubber, the same as the standing side in which it is embedded, the Woven covering isolates the elastic strip from the surrounding rubber in which it is embedded, to such an extent that it retains its own characteristic elasticity instead of becoming a part of the mass of surrounding rubber after the vulcanizing operation. in this respect my invention Will be seen to differ from other means of strengtheningthe standing side of a rubber-belt by inserting a cord or strip of non-elastic material as has heretofore been done or proposed to be done to strengthen the standing strip along the top-edgel/Vhat I claim as my invention is:

l. ln an endless belt having standing sides,

the combination with the standing-side of a means to strengthen the same comprisingl a strip of rubber embedded in the material along the top-ed0e and a covering of Woven fabric separating the said strip from the surrounding material of the standing side.

2. in an endless belt having standing sides, the combination With the standing side of an elastic strip embedded in the material along the top-edge thereof, a covering of Wovenfabric separating the said strip or the standing-side and a Wire coil surrounding the Woven covering.

3. An endless belt having standing sides of elastic material, and a strengthening strip in the material of the standing-side along the edge thereof comprising a strip of elastic material embedded in the material of the standing side, and a covering of fabric surrounding the said strip and separating it from the surrounding material.

4. An endless belt having standing sides formed of rubber, in combination With a strip embedded in the material of each standing side near its top edge and having characteristic qualities of elasticity different from that of the material of the standing sides, and a covering for separating each strip from the material of the standing sides.

GEORGE GATES.

TWitnesses E. E. GsnonN, F. G. GsBoRN. 

